Xemacs is a full fledged programming language with a mail reader, news reader, info browser, web browser, calendar, specialized editor for more programming languages and other formats than most people encounter in a lifetime, and much more.
this package contains the actual binary used to run xemacs. it depends on the xemacs21-support package for lisp and etc files, and the xemacs21-bin package for supporting binaries. this binary does not have any of the mule stuff compiled into it. it should be faster than the xemacs21-mule and xemacs21-mule-canna-wnn packages because it does not contain the fairly large bit of code for either the display or input of non-european characters.
this package actually contains one of the three xemacs binaries available. they are xemacs21-nomule, xemacs21-mule and xemacs21-mule-canna-wnn.